JP2014183669A - Charging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging device capable of reducing a waiting time till each electric vehicle starts charging as well as reducing an installation space, and capable of being installed at a relatively inexpensive cost.SOLUTION: A charging device includes a power feeding device installed corresponding to each parking space and a charging device body. When the power feed from the power feeding device to an electric vehicle is executed once, the second and subsequent executions of power supply to each power feeding device for a predetermined time, in a predetermined order, are inhibited.

Description

  The present invention relates to a charging device that is installed in a parking lot having a parking space for a plurality of vehicles and rapidly charges the batteries of the plurality of electric vehicles in a predetermined order.

  In recent years, electric vehicles that travel using battery power, such as electric vehicles and hybrid vehicles, have been put into practical use, but the current situation is that electric vehicles that run only with battery power have not been widely used. One of the reasons is that there are few places where the charging service is available on the go. The number of places where charging devices that rapidly charge batteries are installed in public facilities and commercial facilities in about 30 minutes is gradually increasing, but the number is still small.

  As a factor that does not increase the installation location of such a charging device, firstly, the price of the device itself is high. If a charging service is to be provided to a plurality of electric vehicles at the same time, it is necessary to install a plurality of charging devices, and the capital investment becomes considerably high. In addition, a space for installing the charging device is required outside the parking space, and the fact that a relatively large space must be secured as a parking lot is considered to be one of the factors that does not increase the installation location of the charging device.

  Here, one charging device is generally installed corresponding to each parking space. For example, a single charging device can charge a plurality of electric vehicles (electric vehicles) at the same time. In some cases (see Patent Document 1, for example). With such a charging device, the installation space can be reduced compared to installing one charging device in each parking space. In addition, a charging service for a plurality of electric vehicles can be provided with a relatively small capital investment.

JP 2011-244630 A

  By the way, in the charging device described in Patent Document 1, when charging the batteries of a plurality of electric vehicles, basically, unit charging (for example, charging for a predetermined time) for each electric vehicle is repeatedly executed in the order of warehousing. ing. If unit charging is repeated in the order of entry as described above, the batteries of each electric vehicle may be able to be charged with a relatively short waiting time if the number of electric vehicles to be charged is about two or three. However, when the number of electric vehicles to be charged increases, there is a possibility that a new user may wait for a long time before starting charging.

  The present invention has been made in view of such circumstances, and can reduce the waiting time until the start of charging of each electric vehicle, can reduce the installation space, and can be installed relatively inexpensively. It is an object of the present invention to provide a charging device that can be used.

  A first aspect of the present invention that solves the above-described problem is a charging device that quickly charges a battery of an electric vehicle that is installed in a parking lot having parking spaces for a plurality of vehicles and is parked in each parking space, A power supply device that is installed corresponding to a parking space and supplies power to the electric vehicle, a charging device main body that is connected to each power supply device and supplies power to each power supply device, and from the charging device main body to each power supply device A power supply control unit that controls power supply of the power supply, and the power supply control unit performs power supply to each power supply device in a predetermined order in a predetermined time regardless of a remaining battery capacity of the electric vehicle. Power supply determination means for determining whether or not power supply from each power supply apparatus to the electric vehicle has been executed, and the power supply means supplies power from each power supply apparatus to the electric vehicle by the power supply determination means. But If it is determined that the degree executed, in the charging device, characterized in that prohibits execution of the second and subsequent power supply to the power feeding device.

  According to a second aspect of the present invention, in the charging device according to the first aspect, the charging device includes vehicle detection means that is provided in each parking space and detects the presence or absence of a vehicle in the parking space. In the charging device, it is determined whether or not power feeding from the power feeding device to the electric vehicle is executed based on a detection result of a detecting unit.

  According to a third aspect of the present invention, in the charging device according to the first or second aspect, the power feeding device includes a power feeding connector connected to the electric vehicle, and the power feeding determination unit is configured to check whether the power feeding connector is attached or detached. The charging device is characterized in that it is determined whether or not power feeding from the power feeding device to the electric vehicle has been executed.

  According to a fourth aspect of the present invention, in the charging apparatus according to any one of the first to third aspects, the power supply control unit detects a remaining capacity detection unit that detects a remaining battery capacity of the electric vehicle powered by each power feeding apparatus. And the power supply means supplies power to the corresponding power supply device even before the predetermined time has elapsed, when the remaining capacity detection means detects that the remaining battery capacity is greater than or equal to a predetermined value. In the charging device.

  According to a fifth aspect of the present invention, in the charging device according to any one of the first to fourth aspects, the power supply control unit includes a charging current detection unit that detects a charging current at the time of charging the battery. The power supply unit terminates the power supply to the corresponding power feeding device even before the predetermined time has elapsed when the decrease in the charging current is detected by the charging current detection unit. It is in.

  In such a charging device of the present invention, the installation space can be kept small compared to installing the charging device in each parking space. In addition, the capital investment per electric vehicle can be kept relatively low. That is, a plurality of charging devices can be installed relatively inexpensively.

  Furthermore, in the present invention, when the power supply from each power supply device to the electric vehicle is executed once, the power supply to the battery for the second and subsequent times of each electric vehicle is prohibited. Shortening can be achieved.

It is the schematic which shows an example of a structure of the charging device which concerns on Embodiment 1 of this invention. It is a block diagram which shows schematic structure of the charging device which concerns on Embodiment 1 of this invention. It is a figure explaining operation | movement of the charging device which concerns on Embodiment 1 of this invention. It is a flowchart which shows the example of control of the charging device which concerns on Embodiment 1 of this invention. It is a block diagram which shows schematic structure of the charging device which concerns on Embodiment 2 of this invention. It is a graph which shows the relationship between a charging voltage and a charging current.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the charging device 10 according to the present embodiment is installed in a parking lot having a plurality of parking spaces 100 and rapidly charges a battery of an electric vehicle 110 such as an electric vehicle or a hybrid vehicle. Fast charging device. The charging device 10 is suitable for installation in, for example, a parking lot of a relatively large commercial facility, and includes a power supply device 20 installed corresponding to a predetermined number of parking spaces 100 and a predetermined number of And one charging device main body 30 installed in the parking space 100.

  The power feeding device 20 is a relatively small device having a power feeding connector 21 connected to a power feeding plug of the electric vehicle 110, and is installed corresponding to each parking space 100. That is, the power feeding device 20 feeds power to the electric vehicle 110 parked in each parking space 100. The power feeding device 20 includes a lamp 22 as a display unit that displays that the battery of the electric vehicle 110 is being charged.

  The charging device main body 30 is connected to a commercial power source (not shown) and charges an AC / DC converter that converts an alternating current supplied from the commercial power source into a direct current, a DC / DC converter that boosts an input voltage, and a battery. Various devices such as an internal battery for storing electric power to be used are provided.

  The charging device main body 30 provided with such various devices is a relatively large device, but only one is installed in a predetermined number of parking spaces 100 (14 in this embodiment). The power feeding device 20 provided corresponding to each parking space 100 is a small device. Therefore, the installation space of the charging device 10 as a whole can be reduced as compared with the case where the charging device is installed in each parking space as in the prior art. Moreover, in the charging device 10 according to the present embodiment, since only one charging device body 30 needs to be installed in the plurality of parking spaces 100, a charging service is provided for the plurality of electric vehicles with a relatively small capital investment. Can be installed.

  Further, according to the charging device 10 of the present invention, since a charging service can be provided in a large number of parking spaces 100, there is no need to provide a parking space dedicated to electric vehicles (only for charging), and the parking lot can be used effectively. Can do.

  By the way, each electric power feeder 20 and the charging device main body 30 which comprise the charging device 10 which concerns on this embodiment are each connected to the charging device main body 30 via the cable 40 and the contactor which is not illustrated, From the charging device main body 30 Power supply to each power supply apparatus 20 is controlled by a power supply control unit 60 described later. That is, the power supply control unit 60 controls power supply from the charging device main body 30 to each power supply device 20 by turning on / off the contactor at a predetermined timing to connect / disconnect each power supply device 20 and the cable 40. doing.

  Hereinafter, power supply control from the charging device body 30 to each power supply device 20 will be described. In the present embodiment, the power supply control unit 60 that controls power supply from the charging device main body 30 to each power supply device 20 is provided in the charging device main body 30, and includes a power supply unit 61 and a power supply determination unit 62. (See FIG. 2).

  The power supply means 61 supplies power to each of the power supply devices 20 in a predetermined order for each predetermined time regardless of the remaining battery capacity of the electric vehicle 110. When power is supplied to a predetermined power supply device 20, power supply (battery charging) to the electric vehicle 110 connected to the power supply device 20 is executed. That is, the power supply unit 61 controls power supply to each electric vehicle 110 by controlling power supply to the power supply device 20.

  For example, in the present embodiment, when the electric vehicle 110 is connected to the plurality of power supply apparatuses 20 (power supply connectors 21), the power supply means 61 basically has the number (1-14) of the parking space 100. Power is sequentially supplied from the charging device main body 30 to each power feeding device 20 in order of youngness, and power feeding to each electric vehicle 110 is executed. For example, in the example shown in FIG. 2, since the power supply connector 21 is connected to the electric vehicle 110 in the parking spaces 100 with the numbers 1, 3, 4, 7, and 8, the power supply means 61 basically has this Power supply to the electric vehicle 110 is executed in the order of the numbers 1, 3, 4, 7, and 8 of the parking space 100.

  The power supply determination unit 62 determines whether power supply to the electric vehicle 110 connected to each power supply device 20 has already been executed. For example, in this embodiment, although not shown, vehicle detection means (vehicle detection sensor) for detecting the presence or absence of a vehicle is provided in each parking space 100, and the power supply determination means 62 detects the vehicle detection sensor. Based on the result, it is determined whether power supply to electric vehicle 110 has already been executed. Specifically, the power supply determination unit 62 is configured to move the electric vehicle 110 from the parking space 100 based on the detection result of the vehicle detection sensor after charging is performed once and the power supply connector 21 is disconnected from the electric vehicle 110. If the movement of the electric vehicle 110 is not confirmed, it is determined that the power supply to the electric vehicle 110 has already been performed. If movement of electric vehicle 110 is confirmed, it is determined that a new vehicle has been parked, and it is determined that power feeding has not been performed.

  As described above, the power supply means 61 basically performs charging of each electric vehicle 110 in ascending order of the number (1-14) of the parking space 100. At that time, the power supply determination means 62 performs each power supply. One condition for performing power feeding is that power feeding from the device 20 to the electric vehicle 110 has not been performed. In other words, when it is determined by the power supply determination unit 62 that power supply from each power supply device 20 to the electric vehicle 110 has been executed once, the second and subsequent power supply to the electric vehicle 110 is prohibited. In other words, the power supply means 61 preferentially supplies power to the electric vehicle 110 that has not yet been charged.

  For example, as shown in FIG. 3, the power supply connector 21 is connected to the electric vehicle 110 in the parking spaces 100 with numbers 1, 3, 4, 7, and 8, and power is supplied to the electric vehicles 110 in the parking space 100 with numbers 8. In this situation, it is assumed that the electric vehicle 110 is newly parked in the parking space 100 of number 2 and the power supply connector 21 is connected. In this case, when the power supply to the electric vehicle 110 in the parking space 100 with the number 8 is completed, the power supply to the electric vehicle 110 in the parking space 100 with the number 1 is not executed, and the parking space 100 with the number 2 Power supply to the electric vehicle 110 is executed.

  As described above, in the present invention, the power feeding determination unit 62 determines whether or not power feeding (battery charging) to the electric vehicle 110 has already been performed. If power feeding has already been performed, power feeding to the electric vehicle 110 is performed. The power supply to the next electric vehicle 110 is executed without executing it.

  Thereby, the waiting time until power feeding is performed on each electric vehicle 110 can be shortened, and the convenience of the user of the charging device can be improved.

  Next, an example of the power supply control by the charging apparatus of this embodiment will be described with reference to the flowchart of FIG.

  As shown in FIG. 4, first, the predetermined number α indicating the parking space is set to number 1 (α = 1) (step S1), and whether or not the vehicle is parked in the parking space of number 1 (α = 1). Is determined (step S2). In this embodiment, the presence or absence of a vehicle is determined based on the detection result of the vehicle detection means (vehicle detection sensor) provided in each parking space. If the vehicle is parked (step S2: Yes), it is next determined whether or not the power feeding connector 21 is connected to the vehicle in the parking space number 1 (step S3). When the power supply connector 21 is connected (step S3: Yes), it is then determined whether or not the first power supply is performed (step S4). Here, in the case of the first power feeding (step S4: Yes), the process proceeds to step S5, and power feeding (battery charging) to the electric vehicle is started. That is, the charging device main body 30 and the power supply device 20 installed in the parking space number 1 are connected, and power supply from the charging device main body 30 to the connected power supply device 20 is started. Thereafter, when the predetermined time T elapses (step S6: Yes), the power supply to the power supply apparatus 20 is terminated, and the process proceeds to step S7 to add 1 to α. Next, in step S8, it is determined whether α is larger than a predetermined value K. The predetermined value K is the number of parking spaces, and is set to K = 14 in this embodiment. When the number α is smaller than the predetermined value K (step S8: No), the process returns to step S1 and the above-described processing is executed in the parking space of the next number (for example, number 2). When the number α is larger than the predetermined value K (step S8: Yes), the above-described processing is executed in all parking spaces, so the process returns to the start and the predetermined number α is the number 1 (α = 1). (Step S1), and the above-described processing is executed again from the parking space of number 1.

  If it is determined in step S4 that power supply has already been performed by the power supply determination unit 62 as described above (step S4: No), the power supply to the corresponding power supply apparatus 20 is not performed. Proceed to S7. Further, when no vehicle is detected at step S2 (step S2: No) and when connection of the power supply connector 21 is not confirmed at step S3 (step S3: No), the power supply is not executed. Proceed to S7.

  As described above, in the charging device 10 of the present invention, among the electric vehicles 110 that are parked in the plurality of parking spaces 100, the electric vehicle 110 in which power feeding (battery charging) is not performed is preferentially performed. The power supply was executed. Thereby, the waiting time until power supply to each electric vehicle 110 can be shortened, and the convenience of the user of the charging device 10 can be improved.

  In addition, when power supply is performed once for all the electric vehicles 110 to which the power supply connector 21 is connected, the electric power supply to each electric vehicle 110 may be stopped. For example, each electric vehicle 110 may be stopped. The number of times of power feeding may be reset, and power feeding may be performed again on each electric vehicle 110.

  In addition, the power supply time (charging time) per time is not particularly limited, and may be appropriately determined according to the number of power supply devices 20 connected to one charging device main body 30. A short time (for example, about 5-10 minutes) is preferable. Furthermore, as will be described as the second embodiment, power feeding may be terminated depending on the remaining battery capacity of the electric vehicle even before the power feeding time per time has elapsed.

(Embodiment 2)
As shown in FIG. 5, the power supply control unit 60 </ b> A according to the present embodiment includes a remaining capacity determination unit 63 and a charging current detection unit 64 together with the power supply unit 61 and the power supply determination unit 62.

  The remaining capacity determination unit 63 detects the remaining battery capacity of the electric vehicle 110 when the power supply connector 21 is connected to the electric vehicle 110. Charging current detection means 64 detects a current (charging current) when power is supplied to electric vehicle 110 (when the battery is charged).

  In the present embodiment, the power supply unit 61 supplies power from the charging device body 30 based on the determination result by the remaining capacity determination unit 63 and the detection result of the charging current detection unit 64 even when the predetermined power supply time has not elapsed. The power supply to the device 20, that is, the power supply to the electric vehicle 110 (battery charging) is terminated.

  Specifically, when the remaining battery capacity (SOC) reaches a predetermined capacity (for example, 80%) by power supply to the electric vehicle 110, the charging device main body 30 even if the predetermined power supply time has not elapsed. Power supply to the power supply device 20 is stopped. This is because if the SOC is about 80%, a sufficient travel distance can be secured, and charging of a battery beyond that is expected to greatly reduce the efficiency. Here, the predetermined capacity of the remaining battery capacity to stop power supply is not limited to 80%, and can be set as appropriate within a range where the charging efficiency of the battery is expected to be significantly reduced. Further, the power supply to the power feeding device 20 is also terminated when a decrease in the charging current is detected. For example, as shown in FIG. 6, the charging current is substantially constant from when the charging of the battery is started until the charging voltage reaches a predetermined value V1, and the battery of the electric vehicle 110 is efficiently charged. However, when the charging voltage reaches the predetermined value V1 and the constant voltage charging is performed, the charging current gradually decreases and the charging efficiency is greatly decreased. Therefore, the battery of each of the plurality of electric vehicles 110 can be efficiently charged by terminating the power supply to the power feeding device 20 when a decrease in the charging current is detected. In addition, the charging efficiency said here shall point out the amount of charging electric power per unit time.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the invention.

  For example, in the above-described embodiment, the electric vehicles are charged in the order of the numbers of the parking spaces, but the order of executing the charging is not particularly limited. For example, it may be executed in the order in which the power feeding connectors are connected to the electric vehicle, or may be executed in the order of reservation, for example. In the above-described embodiment, the battery is charged for each electric vehicle. Of course, depending on the output of the charging device, the batteries of a plurality of (for example, two or three) electric vehicles are simultaneously used. You may make it charge.

  In the above-described embodiment, the power supply determination unit 62 determines whether power supply has already been performed based on whether or not the electric vehicle 110 has moved, but this determination method is particularly limited. is not.

  In the above-described embodiment, the charging device is illustrated as being connected to the electric vehicle by the power feeding connector. However, the present invention can also be applied to a non-contact charging device.

DESCRIPTION OF SYMBOLS 10 Charging device 20 Power feeding device 21 Power feeding connector 22 Lamp 30 Charging device main body 40 Cable 60 Power supply control unit 61 Power supply means 62 Power feeding judging means 63 Remaining capacity judging means 64 Charging current detecting means 100 Parking space 110 Electric vehicle

Claims (5)

A charging device for quickly charging a battery of an electric vehicle installed in a parking lot having parking spaces for a plurality of vehicles and parked in each parking space,
A power feeding device that is installed corresponding to each parking space and feeds power to the electric vehicle;
A charging device body connected to each power supply device to supply power to each power supply device;
A power supply control unit that controls power supply from the charging device body to each power supply device, and
The power supply control unit
Power supply means for performing power supply to each power supply device in a predetermined order regardless of the remaining battery capacity of the electric vehicle in a predetermined order; and
Power supply determination means for determining whether power supply from each power supply device to the electric vehicle has been executed,
The power supply means prohibits the second and subsequent power supply to the power supply apparatus when it is determined by the power supply determination means that power supply from each power supply apparatus to the electric vehicle has been executed once. Charging device. The charging device according to claim 1,
Vehicle detection means provided in each parking space for detecting the presence or absence of a vehicle in the parking space;
The charging device, wherein the power supply determination unit determines whether power supply from the power supply device to the electric vehicle is executed based on a detection result of the vehicle detection unit. The charging device according to claim 1 or 2,
The power supply device includes a power supply connector connected to the electric vehicle,
The charging apparatus according to claim 1, wherein the power supply determination unit determines whether power supply from the power supply apparatus to the electric vehicle has been executed based on whether or not the power supply connector is attached or detached. In the charging device according to any one of claims 1 to 3,
The power supply control unit includes a remaining capacity detection unit that detects a remaining battery capacity of an electric vehicle that is fed from each power feeding device,
When the remaining capacity detecting means detects that the remaining battery capacity is greater than or equal to a predetermined value, the power supply means ends power supply to the corresponding power supply apparatus even before the predetermined time has elapsed. A charging device. In the charging device according to any one of claims 1 to 4,
The power supply control unit has a charging current detecting means for detecting a charging current at the time of charging the battery,
The power supply means terminates the power supply to the corresponding power supply device even before the predetermined time has elapsed, when the charge current detection means detects a decrease in the charge current. apparatus.

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